Apparent yield stress measurement in cemented paste backfill

被引：87

作者：

Simon, Dragana ^{[1
]}

Grabinsky, Murray ^{[1
]}

机构：

[1] Univ Toronto, Dept Civil Engn, Toronto, ON M5S 1A4, Canada

来源：

INTERNATIONAL JOURNAL OF MINING RECLAMATION AND ENVIRONMENT | 2013年 / 27卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

cemented paste backfill; apparent yield stress; binder content; zeta potential; pore fluid chemistry; CONCENTRATED DISPERSIONS; RHEOLOGICAL PROPERTIES; SURFACES; BEHAVIOR; SUPERPLASTICIZER; SUSPENSIONS; HYDRATION; TAILINGS; POLYMER; SIZE;

D O I：

10.1080/17480930.2012.680754

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The effect of specimen composition on the apparent yield stress of cemented paste backfill (CPB) is studied using a Brookfield rotational viscometer with vane geometry. The factors that are assessed include binder type and content, selected chemical admixtures (superplasticizers) and pore fluid chemistry (e.g. ionic concentration and pH). The difficulties associated with performing viscosity measurements on high solids content mixtures are addressed. Additionally, the zeta potential of the mine tailings is measured using an electroacoustic spectrometer. The data indicates that particle packing, electrostatic forces and hydration of the cement affect the flow behaviour of CPB.

引用

页码：231 / 256

页数：26

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